Machine for turning eccentric rings.



PATENTED JULY 14, 1908:

G, p. GRIDLEY. MACHINE FOR TURNING EGGE'NTRIG'BINGS.

APPLICATION FILED NOV. 24, 1905.

3 SHEETS-SHEET 1v fio. 893,239. PATENTED JULY 14, 19-018."

' G. 0. GRID'LEY.

MACHINE FOR TURNING EGGENTRIG RINGS.

APPLICATION FILED NOV. 24, 1905. v

' 3 SHEETS-SHEET 2.

PATENTED JULY 14, 1908.

'Gj'o. GRIDLBY. MACHINE FOR TURNING EGOENTRIG RINGS.

3 SHEETS-SHEET 3.

APPLICATION FILED NOV. 2.4, 1905.

' To all wit-may concern:

Be it known that 'L'Gnonen O. GRI'DLEY, OfWlIidSOI-,il1th6 county. ofWindsor and sEoRoE'o. G-RIDLEY, or'wrunson, VERMONT.

- MACHINE m 'runivme EcoEN'rmc nines State of Vermont, have inventedcertain new and useful Improvements in Machines for Turning EccentricRings, of which the following 1s a specification.

This invention relates to. metal working machines, and-{moreparticularly to those applicable -to the production of eccentric rings,such as used for packing pistons, and thelike 3 i It has for itsprincipal object the pro vision of an eflicient machine whereby therings. maybeautomatically bored, turned eccentrically, and cut ofl froma suitable blank.

In the accompanying drawings, in which designate like parts frontelevation of one embodiment of my invention.- Fig. 2 is an enlargedbroken end elevation thereof looking from the right in 3' is an enlargedbroken top 1 plan view. g. 4 represents a section on .the line 4.4 of.Fig. 2.

' tion 18 The numeral 10 designates a supporting frame, in-Which isjournaled a work-spindle 11 rotatable at the desired speed by fast andloose pulleys 12 mounted upon a drivingshaft which is connected to thework-spindle by gearing inclosed in a case 1'3.v Fixed to the spindle isa face-plate 14, upon-which may be bolted a blankor hollow cylinder Bfrom which the rings are to be formed. Mounted to slide in ways 15 atoneend of the frame is a tool support 16 which may be reciprocatedlongitudinally of the work-s indle by a feed bar 17 extendin through t eframe to the opposite end. flere it has a contact projecpreferablyprovidedwith a roll 19 cooperating with a cam-face 20 upon the ei'lpheryof a cylinder 21. The cylinder 1s astup-on an actuating shaft 22 mountedto rotate in the lower portion 'of the frame, and geared to the drivingshaft or being operated a in any other convenient manner.

Fixed to the support 16 is a post or toolholder 23 adapted to receive aboring bar 24, the axis of which is situated 1n almement with that ofthe work-spindle and which carries at its inner extremity a tool 25, thecutting edge of' which operates over a surface concentric with thespindle axis. Projecting from'the rear of thesu port is a block 26having ways 27 forme in'itsupper face,

Specification of Letters Patent.

' Patented Jul 14, loos.

Application filed November 24,1905. seen No. 28 8,845.

I these ways guiding a tool-holder 28 having a recess to recelve aturning tool 29 which may be secured in position by set screws 29.Depending from the holder through anopenmg in the block 26' areseparated lugs or projections 30, having adjacent parallel faces betweenwhich'is guided a slide 31. In the shde 1s a bore to receivean eccentric32 'splined upon an actuating shaft 33 journaled in'the block 26 and inthe frame. This actuating shaft isrotated at the same speed as thespindle by a spur-gear 34 meshing with a similar gear 35 of the samepitch diameter and having the same number ofteeth, this latter gearbeing secured upon the-spindle adjacent tothe face-plate. From the frontof the frame near the faceplate projects' an arm'36 upon which ismounted to slide a block 37 carrying a tool support 38. The tool supportmay be adjustably mounted upon the block by means of bolts 39extenclinginto the undercut slots 40 in said block. This arrangement permits avariation in the position .of the support 38 longitudinally of thespindle axis. A portion 40 of the support 38 which serves as a holder isshown as inclined at an angle to the spindle axis, it divergingtherefrom as it approaches the spindle, are slots 41 in which arelocated cut-off tools 42, there being such a number of these as willdivide the block into the desired number of rings. The tools are shownas clamped in the slots by plates 43 bearing upon their upper edges andretained in place by screws 44 threaded into the holder. The

cutting edges of the tools are preferably situated atsuccessivelygreater distances from the spindle or lie in a line inclined similarlyto the adjacent edge of the holder. They may be adjusted with respect totheir pro j ection beyond the holder. by screws 45 threaded throughavertical wall 46 at the outer side of the holder and contacting attheir inner ends with the extremities of the tools. As illustrated, thesupport 37 is reciprocated laterally of the spindle by a lever 47fulcrumed upon the end of the frame at 48. From the lower end of thelever is a projection 49 co-acting with a cam-face upon a disk 50 fastupon the end of the actuating shaft work-s indle tion, t e boring barand the turning tool,

since they are mounted upon a common sup-- port,'-advance simultaneouslyto bore out the interior of theblank; concentrically with the spindleaxis and to turn off its exterior eccentrically,*this latter operationbeing effected by the reciprocation ofthe holder 28 which is moved by-Its eccentric sufficiently to give a turni minimum chip at one side ofthe blank and a maximum at the opposite side, the difference between thetwo being in roportion to the e boring'bar and tool move alongthe workthe cuteccentricity desired. As t 4? completesa cut over the entireinner surface of the cylinder at substantially the same instant, so thatthe ring. is left wholly free to fall from the blank and is supported bythe bar. If the eccentricity were attained by boring out the blank of!center, the ring would be severed first at one side and by its retentionby the thinned portion would tend to swing to one side, causing theremainder of the cut to be made out of trueand possibly causing breakageof the tool. The cutting of! thus continues until the last of the seriesof tools has passedthrough the turned blank,

when the operation upon thatparticular blank; is com leted and the ri' Io'ved fro'mt chat and a new' lank applied maybe reto' the iace-Dlate.

The machine being in m0' coin? rear. of the turningtool as the turni"moves-along the work, and means for simul- It will'be seen that thismachine acts automatically throughout the operation upon each blank, andthat the rings are roduced rapidl and accurately without un' ue. strainupon he tools or their sup orts.

Having thus explained t e nature of the invention, and described a wayofconstructing and using the same, although without attempting to setforth all of the forms in which it may be made, or all of the modes ofitsuse, I declare that what I claim'is:

1. A machine of the character described comprising a work spindle, aboring tool'arranged concentrical turningtool, means for reciprocatingthe tool to produce an eccentric surface on thework, a plurality ofcutting-off tools arranged to successively engage the work in thel too ywith the spindle, a

taneously-feedin said turning tool, said bor- .ing tool, and sai cuttingoff tools.

' 2. A machine of the character described, comprising a work spindle, atool slide, a boring tool on'said slide arranged concentrically with thespindle, a turning tool on said slide, means for reciprocating saidturning tool to produce-an eccentric surface on the work, a plurality ofspaced cutting-off tools arran ed with their cutting edges in a lineincline to the axis of the spindle, a second slide for supporting thecutting-01f tools, and means for simultaneously actuating said slidessubstantially as set forth.

' .In testimony whereof I have aflixed my signature, in presence of twowitnesses.

- GEORGE O. GRIDLEY.

M. BJMAY, CLO. STECHER.-

